Demountable brake band



C. Ei. RLSON DEMOUNTABLE BRAKE BAND Filed 5mm# 14. 193i? lll Patented @et 23,

l CARL EDWE CABLSN, OF BROOKLYN, NEW YORK.

DEISOUNTABLE BRAKE BAND.

Application ed .Tune 14g,

To al? 'whom 'may con/ccm r Be it known that l, CARL EnwrN CARLSN, a citizen of the United States, residing at the city of New York, borough of Brooklyn, in the county of Kings and State ol New York, have invented certain new and useful Improvements in Demountable Brake Bands, of which the following is a speciiication.

This invention relates to mechanical brakes, and has particular reference to brakes of the type commonly applied to automobile running gears but -which `are obviously applicable to other types of maA chines in which there is a brake band cooperating with the periphery of a cylindrical or circular brake Wheel or drum.

Among the objects of the invention is to provide means whereby a Worn or defective brake band may be renewed easily by any person -in a few Amoments ci time and at any place and without the necessity for using any unusual or special tools. Under ordinary conditions it frequently occurs that a brake band will fail or show 4serious defect While a driver is on a tour or trip and when for this reason it is impossible for him to' reach with convenience or safety a repair placeor garage 'for the renewal or interchange ofthe brake band.

Another objectol" the invention therefore is to provide a brake band 'ol peculiar construction and having associated with it a plurality olinterchangeable shoes so con- `structed as tobe easily and quickly interchanged or inserted into place while the brake hand proper is practically in normal position aro'undthe drum.

Another Aobject of the invention is to provide peculiar fastening; devices for connecting the interchangeable or removable brake shoes to thebrake band, adaptingthe shoes for the easy interchange already referred to.

With the'foregoing and other objects in view the'invention consists in the arrangement and combination. of parts hereinafter described and claimed, and 'while the invention is not restricted tothe exact details of construction disclosed or suggested herein, still for the purpose of' illustrating a practical embodiment thereof reference is yhad 1922. Serial No. 568,285.

to the accompanyingr drawings, in which like reference characters designate the same parts in the several views, and in which-- Figure l is a side elevation of my improved brake band complete.l indicating in place .the brake drum, in section, and With parts of my improvement in central sec tion corresponding to the line 1--l of Fig'. 3.

Fig. 2 is an inside tace View oi one of my improved interchangeable shoes, substantially as lwould be seen from the line 2-2 of Fig. l, the brake drum being omitted, and with the friction facing broken away at one end to disclose the interior fastening Seat` Fig. 3 is a vertical transverse section on the line 3-3 of Fig. 1.

Fig. 4 is a vertical tranverse section on the line 4-.4 of Fig.. 2 showing especially the sectional torni of the carrier at'the seat.

Referring now more specifically to the drawings, l0 indicates the cylindrical portion of the brake drum which may be ol any convenient or Conventional construction and surrounding which iswmy improved `brake band comprising two main parts,-a brake strap 1l and a series of shoes l2 detachably and interchangeably -connectible to the strap While the strap is maintained in place around the drum. Any suitable means such as indicated. at 13 may be employed to anchor the brake band as a' whole to the machine and also any suitable controlling means, as ll, may be provided for manipulating the brake band around the drum. As to the drum, anchor means 13, and controlling means la, l do not wish to be particularly limited since any suitable or conventional devices may beemployed.

lNhereas in the usual construction the brake band comprises a strap carrying on its inner face friction material in one or two sections, the same being secured to the strap by rivets or the like requiring special fa cili'ties for renewal or replacement, in my new construction l make a greater number of interchangeable shoes 12, shown herein as four in number, all of the same length circumferentially, and each but slightly less than a quadrant in length. These shoes, as already stated, are all made exactly alike and so are interchangeable, making it verpedient for any desired or neceary ninnber of them to' be connected to the brake strep at any time, either ell four new ones or any number less than tour. Moreover, 5 in viev'v'l of' the tendency sometimes for s,

brake band to Wear at one spot-more than slice comprises. two

main parts a lcarrier l5, made preterelolyv 'fof ,a good'quelity of steel or the like, of

'to the inner vs urfecc'a of thestra J ll, and a facing member '.16Y of any suitaoe' gripping material, su'chlesa composite asbestos and "metelnature The carrier and facing 'inembers are securedv rigidly together as byl rivets 17 or thelike so'that each. shoe is treated asia unit and sfchfis adapted to be in .1 serted into place between the strap .il and the drum While the strapis -in place surslipped laterally between the strep and the drum, the strap' being siiliicientlyfloose for` this purpose. V

Se'parable fastening means of any suitable or convenient nature liney proi/ided` tor locking the 4shoes from lot/f el or circumferent'el displacement or movement .with respectl to the strap. F or this purpose l1 pro vide a series ofl screws or bolts 18 each hav` ing a T-headrlQ on its inner, end, end e lock'washer20 and nut 2l on itsouter end..V I` indicate preferably the use of 'twdof "these bolts torneooperation with each shoe. The strap andl carrier are .torn/led. with. registeringslots or holes 22 and respectively through which the `head 19 oi the bolt may `pass radially of theentire constructoinand aftei'the' bolt is inserted it is 'given aque-rter turn until the head is stopped against one or a pair ofjlugs 24 struck inward from ythe vside wallgportions of the slot 23. 'lhe spring Washer 20 and nut 21ers then tight l ened to lock the bolt from reverse movement, 'and consequently the shoe' will be lockedto the inner surfacev of the strap. The operator.` may easily observe the registration of the two slots 2Q-and 23 when apA plying,r e new shoeyandtheyboltS are easily slipped into place in 'the manner indicated While'the shoe is in the position ot such registry.y ltwill be understood accordingly' thatA the shoe may conseqnentlybe easily pnt in'pla'ce laterally or by a movement perallel tothe axis of the drum end the tasten rect a defective brake, even Without ein-v `moderate thickness; and shaped to contorxn rounding the drum, the shoe being easily ing means put Vinto piece `from the outside.

Lenses oi the strap, without compelling thema chine to be taken to e shop or for the dsconnection ot' the strep from the machine.

lny order to accommodate the heads 19 ol the bolts in connection with the strap and carriers, andvwithouti disturbing the outer lcirculerv form. lot' the listing 'members or or outer side of the seat 25 `is fitted and' whereby the registration ofthe slot-s 22 and .Q3-is facilitated. Thus the -continuity end strength of the strap'are not disturbed or ail'ected, and theexpo'sededges of the strep and shoes preserve their smooth, neat, and practically conventional appearance. Moreover, `by forming the depression or seats re- .mote .from Vthe .edges ot the strap'and shoes f the yprojections extending into `the semef trom the sho-esserve ina large measure to render the shoes selfretoinedin place, l:from

lateral as Well :is circumferential 'displace-v nient. f i l l cleiin:

l. ln" e brake the combination with a .brake strap and e drum surrounded hy'said strap, of a plurality of shoes inserteble lateral y between the strap and the drum While the strap is in place therearound, each shoe comprising a facing member ot friction material. and a carrier to which the facing member is'secnred. and whereby the facing -rneinbc'r held in operative position, and means entirely on the outside of the facing member through the carrier for securing the shoe 'inposition within the strap. 'I

:2. A vdevice asset forth in claim l in which the means for fastening the shoes in and passing. radially outward place is inserteble through the strap 'from y the outside thereof; l

' 3. Adevice as set forth inl claim 1 in which the fastening means for the shoes com prises a series of "lheaded bolts, the heads being; insertable radially of the brake from the outside of the strap.

l fl. ln a bralre,' the combination of a strap having a plurality of depressions formed on its inner surface remote from its edges and constituting seats, brake shoes having similarly formed projections at their outer l surfaces adapted to fit into seid seats of the strap, and means 'to lock the shoes to .the strap in connection with seid seats.

o. A device es set lforth in claim 4C in which the interlittinp; strep and shoe seats srs formed 'with registering slots and the fastening means nclues T-headed lolts material, means to secure the facing memh heads of Whlch ae adapted w pass ber the 'carler as a Commercxal umt, and ,hceugh sind slots and subsequently turn means entlrely on the outslde of the faemg Venroule/l thel axes f0.1' nzelockng the heads :member and passlng radially outward in place, though the earner for securingl the Shoe 6. The here@ descmberl mierchangeable m cperatve posmon. shOe 'for vehlcle brakes, the 'same comps- "in testlmony whereof l afx my signature.

be? of ficton CARL EDWN CARLSON.

5mg a carrier, a facing mem 

